So
Explain that the hall with internet is expensive... (its maintenance essentially comes down to cleaning in the morning, electricity costs, and internet). I don't think there's a queue of people wanting to rent it in Volgograd for the May holidays, especially for 6 days...
But again, the privileges that already exist, considering the level of the establishment, indicate that the owners are much more willing to cooperate and engage in dialogue than at, say, Olympia (a 25% discount on all additional services is actually a VIP-level discount for guests).
And if the owners of the base (and unlike many, I can imagine the level of negotiations - and how much haggling goes on there for each item) say no and tell you to go away, then your conscience as a potential organizer will be clear: you did everything that was required, and even more - considering that you don't owe anyone anything.
(And I will remind the highly respected voting assembly once again: The voting was announced in advance, the voting algorithm was announced in advance, the voting lasted for a WEEK, and everyone who voted essentially gave their word: "I agree with the voting system, I vote for one of the proposed options, and I accept the objective result of the voting as a given." I remind you that there was and still is no application called "Korolev"...)
"Совесть - она либо есть, либо её нет" (с) RedWhait HP